热轧辊耐磨堆焊焊条的研制

Development of Electrode for Hot-roller Hardfacing

本文研究了一种用于热轧辊堆焊的耐磨堆焊焊条，通过反复调整焊条药皮组成，找到了适合热轧辊堆焊的合金系。通过堆焊层的金相显微分析及Ｘ－射线物相分析表明：新研制的热轧辊耐磨堆焊合金的组织为马氏体加残余奥氏体加碳化物。堆焊层的硬度在ＨＲＣ５８～６０之间。高应力磨料磨损实验和工业试验证明：热轧辊堆焊合金的耐磨性优良，是４５钢的６．１倍。在５８０℃，经１０００ｍｉｎ时效后，堆焊层硬度仍保持在ＨＲＣ５８～５９。

A special hot-roller hardfacing electrode is studied in this paper.A new alloy system suitable for hot-roller hardfacing is found by improving the composition of the electrode coating.X-ray and microstucture analyses indicate that the new hardfaced metal microstructure consists of martensite.retained austenite and carbonide.The hardness of the hardfacing is among HRC 58～60.Wearing resistance tests and industrial practices have proved that the hardness is 6.1 times as high as 45 sted's.The hardness still keeps between HRC 58 and 59 after 1000minutes,at 580℃.